Rattles

Went away in Fairford at last, quite a few rattles while on road, decided to have a look at what was causing them now back.
1) both front table fixing brackets loose 4 screws in each bracket, unable too tighten screws fixed with larger special screws, holes in brackets needed opening out to except new screws.
2) all 4 clips holding cooker rack loose managed to tighten but unsure if they will hold.
3) sliding door rattles most items on door padded out we try on road next week.
4) I think every screw was loose on vanbut tightening is difficult because to much stress and they start to spin
Van is 1 year old
Johndean

Similar problem with hob pot support clips. they seem to come loose with each use, possibly caused by temp changes. I contemplated thread lock on screws but dont know if it will withstand the heat. WRT sliding door, I have never been in any conversion where the rattles have been completely eliminated, though some are much better (worse?) than others. There are many different thoughts on dealing with the problem, some more successful than others.
Ben